Pavement-breaking device



Jan. 5 1926.1 f

W. W. SHOE PAVEMENT BREAKING DEVICE Filed April 4, 1924 Patented 5, 1926.

umn-En STATES sEsT Avait/ters oosv PATENT OFFICE.

` 0 WILLIAM W. SHOE, OF PHILADELPHIA, PENNSYLVANIA.

revenants-BREAKING DEVICE.

Application tiled Aprila, 1924. Serial No. 704,148.

' which the following is a specification.

My invention relates to pavement breaking devices. The object is to provide-improved means for making the. initial break .in a' pavement, especially of. blocks, bricks or the like, when it becomes necessary to take up a section of same.

'Referring to the drawings, which illustrate, merely by way of example, suitable means for effecting myinvention;

Fig. 1 is a side elevation of two blocks with thevkey for dislodging the same.

Fig. 2 is a plan view of same.

Fig. 3 is a perspective view of the key..

Fig. 4: is a side elevation of a modification. 1

Fig. 5 is a-perspective view-of the modified key member.

`Fig. 6 is a cross-section showing a modification of the engaging recess.

. Similar numerals refer to similar parts throughout the several views.

"It is well known that when a avement is onccllaid of bricks, or blocks, or similar close lying units, especially for street surfaces, it

'is difficult to make the initial break in same, 'when it becomes necessaryto take up a section of the pavement, for repairs, for layin pires or the like. a

lily invention overcomes the diiticulty by providing means for applying the necessary force beneath the abuttmg e'dges of a pair of paving elements, in orderto lift the same out or' their` normal position, an'd thus provide a s ace in which tol insert a suitable tool, suc asa crowbar, for dislodging the pavement surrounding said initial opening. In Fig. 1 is shown paving blocks 7 -and 8, with the key or body 9 ositioned between the abutting ends of said blocks. form shown inaFigs. 1, 2 and 3, this key or body 9 is formed with curved sides,'taper ing from the bottom toward the top, and the two abutting blocks have their ends preferably cut or formed with curved surfaces corresponding to the formation of body 9, as shown in Fig. l. From such cooperating formations, it results that a portion of the In the engaging surface' of body 9 is verticall beneath the engaged surface of the bloc so that the upward movement of body 9 causes corresponding movement .of the adjacent Ablocks and consequently their dislodgement'.

The curved formation is substantially in the arc of a.ci1-cle, thecenter of which is at upper remote edge of the block, as at 10. This obviously facilitates the movement of ,the two abutting ends, in the direction of the arrow, abouttlie said centers 10, when the. member 9 is lifted. The member 9 is provided with suitable means for securing a lifting device thereto. In the example shown in Figs. 1, 2 and 3 this consists of a threaded opening afs at ll, into which an eye-bolt may be secured, which eye-bolt is then connected to a suitable lifting jack or other device. When the pavement is laid the opening 11 is preferably filled 'with wax or other suitable substance which is easily displaced, but which normally serves to keep out dirt or other foreign substances.

In Fi s. 4 and 5 is shown a key or dislodging ody 12 which is provided with the flanges A13, adapted to lie beneath the abutting ends of the blocks. While this device will undoubtedly cause an initial break in the pavement, it may'require more lifting force, since it makes no provision for the curved movement of the lower edges of the abutting ends, and thus requires a certain amount of give or compression between these blocks an'd those adjacent thereto, or else a able methods of securing the lifting mechanism to the key or dislodging device.

What I claim isz- .1. A pavement breaking device, comprising a body permanently positioned between abutting pavement elements, said body having engaging surfaces extending beneath adjacent portions of said pavement elements so that u ward vertical movement of said body will dislodge said elements.

2. A pavement breaking device, comprising a body permanently positioned between` .nbnling pnvenienl elements, said body lmv v BEST AVAlLABLE CGPY ing engaging surfaces extending beneath ad- A jacentportions oi" Suid pavement elcnients'l so that upward vertical movement of Said body will dislodge said eloments, und means for removably secningr the said Body to a lifting device.

WILLIAM W. SHOE 

